You cannot go wrong with a hearty yet simple casserole! This Chicken Mushroom Casserole is loaded with so many flavors and is so filling. The casserole is layered with potatoes, chicken, and mushrooms in a creamy sauce topped with cheese.

If you love casseroles, you have to try our Chicken Casserole and the popular Chicken Bacon Ranch Casserole recipe.

Potato chicken mushroom casserole in a casserole dish with a spoon topped with fresh chopped dill.


We love this chicken mushroom casserole for dinner. The layers of potatoes with chicken and sauteed mushrooms in a creamy and thick sauce then loaded with cheese is so so good.

How to prepare the chicken, potatoes and meat for this chicken casserole recipe.


With just a few basic ingredients you can have this hearty casserole ready.

  • Chicken- You can use either boneless skinless chicken breast, chicken thighs, or chicken tenderloins (chicken strips) for this casserole.
  • Chicken seasoning- Salt, pepper, paprika, and Italian seasoning are what we seasoned the chicken with.
  • Potatoes- Russet, Idaho, or Yukon gold potatoes can be used for this dish. We thinly slice our potatoes using a Mandoline Slicer so the potatoes are even in thickness.
  • Mushrooms- We used white mushrooms but you can use portabella, shiitake mushrooms, or your favorite mushrooms.
  • Onion- Sweet or cooking onion will work.
  • Garlic- We used fresh garlic but you can substitute it with garlic powder.
  • Butter- Unsweetened butter adds creaminess to the casserole.
  • Mozzarella Cheese- You can use freshly grated mozzarella cheese
  • Herbs- You can use your favorite herbs; cilantro, dill, fresh thyme, or parsley will all work.
  • Sauce- For the sauce, stir together mayo, egg, sour cream, and milk with a seasoning of salt and pepper.
How to assemble this delicious potato casserole with chicken, mushroom and cheese in a white casserole dish.

how to make the chicken mushroom casserole:

This potato and chicken casserole with mushrooms is by far our favorite and most often made casserole, especially if we like casseroles.

  • Chicken- In a small bowl, combine seasonings. Beat the chicken until even in thickness and season with seasoning blend on both sides.
  • Cook chicken- In a large skillet, over medium-high heat, add olive oil in a skillet and pan sear the chicken breast and then turn down the heat and finish cooking.
  • Potatoes- Peel the potatoes and slice them into thin pieces, using a mandoline slicer (J).
  • Cook potatoes- Saute the potatoes in a skillet with oil until the potatoes are tender and season with salt and pepper to taste.
  • Mushrooms- Saute the sliced mushrooms, chopped onions, and minced garlic with oil until the mushrooms are golden.
  • Sauce- In a bowl, combine all the ingredients for the sauce mixture.
  • Assemble- Add the potatoes to the casserole dish and spread evenly, and top with fresh greens. Slice the chicken and add overtop the potatoes. Finally, add the sauteed mushrooms and butter slices.
  • Add sauce and cheese- Pour the sauce over all the ingredients and top with shredded cheese and chopped greens. Cover the baking dish with foil and bake.
  • Garnish- with fresh herbs and freshly grated black pepper over the entire casserole.
  • Serve and Enjoy!

A casserole dish with potatoes, chicken and mushrooms with a spoon.

Fridge: Keep leftovers refrigerated for up to 3 days.
Freezer: We do not recommend freezing this dish.
Reheat: Reheat in the oven, microwave, or skillet until warm.


Can I prepare this casserole recipe ahead of time?

This chicken casserole recipe is great to make ahead of time! Just prepare the dish per instructions, cover it, and refrigerate until ready to bake. Then, bake per instructions adding 5 minutes to the cooking time.

Can I substitute the mushrooms?

You can leave out the mushrooms completely or just add them to half of the dish. Our kiddos don’t like mushrooms, so we just add some to one side for my husband and I.

Can I use different meat?

Yes, you can use your favorite protein. You can substitute the chicken for beef, pork, or even use ground meat!

How to reheat a casserole dish?

We really like the milk and the richness it gives the sauce but you can substitute it for chicken broth if you’d like.

try other casseroles recipes:

Potato Chicken Mushroom Casserole

Author: Valentina
4.58 from 14 votes
Hearty Potato Chicken Mushroom Casserole recipe with layers of potatoes, chicken and mushrooms smothered in a creamy sauce and loaded with cheese.
Prep Time: 15 minutes
Cook Time: 1 hour
Total Time: 1 hour 15 minutes
Servings: 6 servings


  • 1 lb chicken breasts, boneless skinless
  • 8 large potatoes, sliced
  • 2 Tbsp cilantro, chopped
  • 2 Tbsp dill, chopped
  • 12 oz mushrooms, sliced
  • 1 small onion, chopped
  • 2 garlic cloves, minced
  • 4 Tbsp butter
  • 2 cups shredded mozzarella cheese
  • oil, for sauteing


  • 4 Tbsp sour cream
  • 1 egg
  • 2 Tbsp mayonnaise
  • 1 1/2 cups whole milk
  • ½ tsp salt
  • ¼ tsp ground black pepper

chicken seasoning-


  • Beat chicken breast until even in thickness. In a bowl, combine seasonings for chicken. Season both sides of the chicken breasts.
  • In a large skillet, over med/high heat, heat 2 Tbsp oil. Sear chicken 2-3 minutes per side. Turn heat down to low and cook another 5-6 minutes, until the chicken is tender and fully cooked.
  • Remove the chicken from the skillet and cover to keep warm. In the same skillet, saute the mushrooms with chopped onions and minced garlic. Cook until mushrooms are golden, salt and pepper to taste.
  • Meanwhile, peel the potatoes slice into thin slices.
    Over medium/high heat, saute the potato for about 10 minutes or until potatoes are tender. Season the potatoes with salt and pepper.
  • In a bowl, whisk together the sour cream, egg, mayo, milk, salt and pepper.
  • Once the potatoes are tender, transfer them into a casserole dish. Spread them evenly along the bottom of the casserole dish. Top with chopped greens.
  • Slice the chicken breast into thin strands. Spread over the potatoes in the casserole dish.
  • Top chicken with the mushroom mixture. Place 4 Tbsp of butter into the dish.
  • Combine all the ingredients for the sauce and pour the sauce all over the casserole.
  • Add the cheese and cover dish with foil.
  • Baked at 400°F for 35 minutes, remove the foil and bake an additional 10 minutes.
  • Garnish with herbs and serve.


548kcal Calories44g Carbs37g Protein26g Fat13g Saturated Fat138mg Cholesterol1075mg Sodium1789mg Potassium8g Fiber6g Sugar813IU Vitamin A36mg Vitamin C374mg Calcium10mg Iron
Nutrition Facts
Potato Chicken Mushroom Casserole
Amount Per Serving
Calories 548 Calories from Fat 234
% Daily Value*
Fat 26g40%
Saturated Fat 13g81%
Cholesterol 138mg46%
Sodium 1075mg47%
Potassium 1789mg51%
Carbohydrates 44g15%
Fiber 8g33%
Sugar 6g7%
Protein 37g74%
Vitamin A 813IU16%
Vitamin C 36mg44%
Calcium 374mg37%
Iron 10mg56%
* Percent Daily Values are based on a 2000 calorie diet.
(The nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.)